After doing rigorous attempt to connect my cyberoam based cable net . Even installed linc ...and started learning gdb in order just to have my net connected from linux.
After all failure .i frustatedly did the following:
new-->xdsl-->account information--> activate
and i am blogging from fedora 7 using that cable connecion.
What a fate....
moral of the story
"never miss out a single try...."